O Level Biology MCQs – Certification Test 405

Facts about Smoking Trivia (Question 405) – Study App & e-Book Download

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MCQ 405: Excess mucus is produced causing smokers cough due to:

nicotine
tar
Irritants
morphine

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Free Facts about Smoking Trivia App: Study Facts about Smoking Notes, O Level Biology Trivia App, and 9th Grade Biology Trivia App to achieve learning excellence.

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